WAEC Physics 2016 Objective — Question 5
Question 5 of 50 from the West African Examinations Council (WAEC) Physics 2016 Objective paper, with the correct answer and a full explanation.
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5. Which of the following substances lowers the surface tension of water? A. Metal B. Sand C. Detergent D. Paper
- A. Metal
- B. Sand
- C. DetergentCorrect
- D. Paper
Explanation
Surface tension is reduced by impurities such as detergents, alcohol etc., and by increasing the temperature of the liquid.
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